*{
    margin: 0;
    padding: 0;
}
ul,li{
    list-style: none;
}
a{
    text-decoration: none;
    color: #717171;
}
body{
    font-size: 16px;
    font-family: sans-serif;
    line-height: 22px;
}
.clearfix::after{
    display: block;
    content: '';
    clear: both;
}